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WASHINGTON CO RWD #7

Oklahoma — Community Water System — PWSID: OK3007415

System Information

PWSIDOK3007415
System NameWASHINGTON CO RWD #7
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region06
Serves SchoolNo
WholesalerNo
First ReportedMay 21, 2004
Last ReportedNov 14, 2025

Location & Contact

StateOklahoma
CityDEWEY
ZIP Code74029
AddressLarry Underhill, Chairman
OrganizationWASHINGTON CO RWD #7
Phone918-440-9638

Population & Service

Population Served258
Service Connections133

Drinking Water Violations (49)

This water system has 49 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Apr 1, 2025 Jun 30, 2025 Total Haloacetic Acids (HAA5) MCL Yes No .072 MG/L 0.060 mg/L .06 Archived Jun 30, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Mar 31, 2025 Total Haloacetic Acids (HAA5) MCL Yes No .069 MG/L 0.060 mg/L .06 Archived Mar 31, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Mar 31, 2025 Total Haloacetic Acids (HAA5) MCL Yes No .069 MG/L 0.060 mg/L .06 Archived Mar 31, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Mar 31, 2025 Total Haloacetic Acids (HAA5) MCL Yes No .069 MG/L 0.060 mg/L .06 Archived Mar 31, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Mar 31, 2025 Total Haloacetic Acids (HAA5) MCL Yes No .069 MG/L 0.060 mg/L .06 Archived Mar 31, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Unaddressed — Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Unaddressed — Lead and Copper Rule Revisions
Jul 1, 2024 Jul 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Jul 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Jul 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Jul 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2024 Mar 31, 2024 TTHM MCL Yes No .105 MG/L 0.080 mg/L .08 Archived Mar 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .103 MG/L 0.080 mg/L .08 Archived Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 — Lead and Copper Rule MR No No — TT — Resolved Aug 15, 2022 Lead and Copper Rule
Dec 30, 2021 — TTHM MR No No — 0.080 mg/L — Resolved Apr 15, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Archived Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 14, 2022 Lead and Copper Rule
Jan 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 14, 2022 Lead and Copper Rule
Jan 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 14, 2022 Lead and Copper Rule
Jan 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 14, 2022 Lead and Copper Rule
Jan 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Dec 14, 2022 Lead and Copper Rule
Jul 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2019 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2019 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Sep 29, 2018 — TTHM MR No No — 0.080 mg/L — Resolved Jan 11, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 29, 2018 — TTHM MR No No — 0.080 mg/L — Resolved Jan 11, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2018 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2018 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Apr 1, 2018 Jun 30, 2018 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jan 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jan 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jan 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2016 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2016 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Apr 1, 2016 Jun 30, 2016 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Mar 31, 2016 — TTHM MR No No — 0.080 mg/L — Resolved Jan 11, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jan 1, 2016 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jan 1, 2016 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2015 Dec 31, 2015 Lead and Copper Rule MR No No — TT — Resolved Dec 31, 2015 Lead and Copper Rule
Jul 1, 2015 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule
Jul 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Aug 11, 2021 Lead and Copper Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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